Valve for controlling fluids



May 6; 1930. y R.. E. MITTON 1,757,259

VALVE FOR coNTRoLLNG FLUIDs Filed Jan. 3, 1.928 2 Sheets-Sheet l VALVEFOR coNTRoLLYING FLUIDS Stmme Patented May 6, 1930.

UNITED s'lA'riEzfsV PATaNTfol-"FICE' RoBERr Mrr'ron, or senr LAKES CITY,tiran `VALVE FOR CONTROLLING FLUIDS Application filed January 3, 19728.Serial No. 244,223."

My invention relatesto. valves, and partie-j ularly to fluid controlvalves, and has for its .object to'provide a new and eiiicient controlvalve for fluids which will be positive in its action yet will beaccurate and will control the amount ofpressure passing therethrough tothe fraction of a pound. Y l

A further object is `to' provide a control Vvalve which will control theflow of uids l le therethrough and will itself be actuatedV by the backpressure of thejfluids to move the foot of the operator a suilicientamount to shut olf the pressure from the source of sup- V ply and one inwhich the involved air or fluid i5 pressure is controlled by themuscular action of the operator. p

These objects I accomplish with the device Y' illustrated in theaccompanying drawing in which similar numerals and letters of refer- 20ence indicate like parts throughout the sev-1 eral views and asdescribed in the specification forming a part of thisapplication andpointed out in the appended lclaims. In the drawings, in which I haveshown Y the best and most preferredmanner of building my invent-ion,Figure l is aside elevation ofthe valve. Figure 2 is a side elevation ofthe valve installed, showing the pressure gauge on the instrument boardand the air Y supply tank. Figure 3 is a diametrical vertical 'sectionof the valvef Figure-1 is a side view ofthe piston which operates in thecasternally threaded and the casting 2 external- Y ly threaded so thatwhen assembled they screw together, one within the other, as shown at2s, Figure 3, forming a cylindrical casingv with both ends closed. Thesaidk casting 1 5:55 is provided with a boss 3 on the bottom side'thereof, and an outlet opening 4 is provided on one side of said boss ina cylindrical boss portion 5 of the casting 1 and another cylindricalboss 5a is formed on the bottom of said casting at an angle to andadjacent the central boss 3. The eXtreme endof the said boss 5a isbifurcated into-.two spaced apart arms l 6 and 7, between which theoperating lever L of the valvelis carried. The said arms '6' and 7 arecentrally bored to receive pivot pins on 55 which vthe operating leverLis pivoted .and supported. The said boss 3 is centrally'bored toVreceive a piston rod 8 longitudinally `Inovable therein. The said'casting 2 is provided with a centrally positioned boss 9 on thetop GOside thereof, which boss is centrally bored at 12 and internallythreaded to receivea closure cap 10. An air inlet bore 11 is boredon oneside of said casting 2 and an outlethole 15 is Vbored throughacylindrical boss 15? on one G5 -side `of the top portion of saidcasting. The

bore 12vis constricted, asiat 13, to form 'a valve seat 111, and the cap10 is centrally boredkto carry a valve stem 16. A valve 17 is formed `onthe end of the said stem 16 and said head 'is 70 Y longer'than the usualtype cone valve and is adapted to close the valveseat 14, and anothervalve seat 18 at the sametime,'malring one valve close the two seats andcontrol the pas- -sage of fluidthrough both valve seats. The

saidvalve seat 18 is formed on the top end ofthe rod 8 and said rod'iscentrally bored through la portion of itslength ,at 19, with.lateralports 2() thereinlatthe bottom'ofthe hole or bore 19 to allowpassage of air thereen through.V VApiston ,21 is Vsecured to the said`1od8by threads formedl on the outer side of .said rod, and a nut 22holds said piston21 inplace` on said rod8. The said piston 21 is'composed' of a piston block 23, having an an- S5 nular groovetherearound in which an eX- panding piston ring 21-is carried and a cupleather 25vis carriedpin said casin'gbetween said Ablock 23, the ring24g-and the inner face of saidcasing,so that expansion of the ring J0 24will press thejcup against the sides of the casing, preventingwanypassage of air therearound.. A plate 26 is provided to .holdthe saidleather against the piston Yblock 23. The lowerendof the said-rod 8 iscentrally vbored '95 .to receive a ball'27, which is adapted to rotatein said bore when the valve is beingv operated by the lever L. Theouterfedge 28 ofthe rod 8 .is pressed inwardly around the ball to retainit in place. Nuts 29 are screwed ontothe 100- external threads of theboss a and the boss 5 to secure the said valveD in its entirety to theVdash board A. The said lever L is made as shown in Figure 3, with thefoot engaging portion L1 formed on one end thereof and turned upwardlyso that the foot ofthe operator will-not engagewith the 'fbodyvofvthelever when it is being operated 'and the other end of the said lever hasa protrudingrflat portion L2 thereon which is adapted to be Vbroughtagainst theibottom side' ofthe ball 2'? to actuate the valve. i

The operation of my device is as'follows: The valve is mountedonthe'dashboard of the automobile as shown in Figure l, and theVY iuidlines connected which lead to-thejapplication. A 'lf-connection T isprovided in the -to enter the cham'ber 30 above the piston v2l. lThechamber being in open connection with lthe hole 15', thefluid passes outtothe applicationvof the brakes.r ',When suficient back pressure'fh'asbeen built; up'in the brakes and brake lines, thepiston 21 will be moved,downwardly by such pressure and the `musasy desired. o

Y The involved'fluid pressure in the chamber `outlet into the open air.

cles of the'lleg of thev operator will give sulficiently t0 allow the-valve1l7 to close the `seat Hand no more fluid -will be allowed toenter Y the chamber 30; To release-the brakes'andthe pressure in thelines, the operatormoves his .foot up from the lever L and the force ofthe Huid in the'chamber 30 will force the piston 2l'downwardlysufficiently for the rod'8 to bemovedandthe valve seat `18 Vmoved awayfromthe yvalve, 17, allowingV the -fluid in the chamber and lines'toVpass out through the bore- 19, the ports'20' into the chamber '31'lbelow vthe piston 21, and the; chamber 31 Vbeir'ig finV yopenvconnection with V the Lexhaust or outlet opening 4,'the fluid escapes tothe The' operation maybe repeated f A open air.

30 andthe lines to the application isl'the pressure which actuatesthemuscles of the opera- 'tor vsuiiieiently to close the valve Vseat T14and Y n the release of the lever 'L by the operator 'in y vanydc'legre'awhichihe desires regulates the. Y. i lamountq'o'fpressure allowed topass' out of tlieexhaust or the applicatieny chamber gto Having thusdescribedV my invention 4Iy desire-toi secure'by Letters Patent andclaima'tluidfcontrol valve thecombination of a Cylindrical casing; vanexhaust and an application connection therewith; a portion provided inthe top end'thereof forming a nvalve seat therein; an inlet connectionin the space above said valve seat; a piston operable within saidcylinder, having a hollow stem therein with ports inthe bottom endv ofsaid hollow in open `connection with the chamber below said piston;'avalve seat formed on the top end of said stems; a lever to move saidpiston and stem; Vanda"valveadapted to seat inboth of saidvalve seats toclose one or both, as necessary. y v2. In atfluidgcontrol valve thecombination of a cylindrical casing having inlety applicavtionf andexhaust openings therein; a piston operablerwithin said casing, havingthe top end of the piston rodhollow" and in open connection withthespace above and belowl said piston; means to manuallymove said pistonand rod; a valve. seat formed in the topend of'said casing between thelintake opening and -theinterior of said cylindergand a valve adapted toclose both said valve seat-and the' top endofthe piston rod as'necessaryto'control the flow of luidto the application and the exhaust.

3. A fluidcontrolvalve comprising-a casing; apiston slidably carriedinsaid casing;

vintake and exhaustvalves `controlledfby the Y movement of said plstonunder HuidV pressure v and opposed-to the-.direct lmuscular tension ofthe operaton' Y Y Y 4; A fluid control valve comprising a 'casv ingyapiston slidabl-ycarried therein, having a valve seatin its center andanexhaust port therethrough;l a single intake valvey adaptable tol seat on`-exhaustand intakev ports simultaneouslygand means to automaticallyloperate vsaid 'valves byy the finvolved fluid pressure to directvarying pressures according-to the variable direct' muscular tensionkofthe operator.

Inl testimony whereof I have affixed my"y signature..

i ROBERT

